I wouldn't got for any of the smaller plecs with a JD (bar a baby JD, and only as a temporary thing til it grew up). You need something a bit tougher as some JDs aren't too keen on sharing their tanks with anything, and a slow moving plec could be seriously bullied.
Definitely not a clown plec anyway. You might get away with a BN but if it were me, I wouldn't risk it - and I'd go for something bigger, as long as the tank size permitted.